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    • 33. 发明授权
    • Method and apparatus for fastening an eraser to a pencil
    • 用于将橡皮擦紧固到铅笔上的方法和装置
    • US4520548A
    • 1985-06-04
    • US445524
    • 1982-11-30
    • Harald H. KremserWalter Barth
    • Harald H. KremserWalter Barth
    • B43K29/02B43K15/02B43L19/00B21D39/00
    • B43K15/02B43L19/0087Y10T29/49915Y10T29/49918Y10T29/49929
    • A method and apparatus for securing an eraser to a pencil while deforming aheath mounted at one end on one end of the pencil and on the other end partially receiving the eraser, the sheath being subjected to deforming forces directed on the one hand toward the pencil and on the other toward the eraser. In order to provide a fastening of the sheath to the pencil and to the eraser, the pencil is guided along a path while at least the sheath is rolling, and the sheath is subjected to the deforming forces at least intermittently while rolling. The apparatus for performing the method comprises a pressure gap decreasing height between two parts that are movable relative to one another. The pressure gap is larger at the inlet and smaller toward the outlet than the outer diameter of the sheath in its underformed state.
    • 一种用于将橡皮擦固定到铅笔上的方法和装置,同时使安装在铅笔一端的护套变形,并且另一端部分地接收橡皮擦,护套经受一方面朝向铅笔的变形力 而另一方面是橡皮擦。 为了提供护套与铅笔和橡皮擦的紧固,铅笔沿着路径被引导,同时至少护套滚动,并且护套在滚动时至少间歇地经受变形力。 用于执行该方法的装置包括可相对于彼此移动的两个部分之间的压力差减小高度。 入口处的压力差较大,而在其欠成形状态下,护套的外径比出口的压力小。